Retaining wall block



FIG. 1 is a perspective view of a retaining wall block according to my design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines in the drawings are included for the purpose of illustrating a portion of the retaining wall block that forms no part of the claimed design. 

The ornamental design for a retaining wall block, as shown and described. 